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  1. Prepare
  2. Python
  3. Regex and Parsing
  4. Validating Credit Card Numbers
  5. Discussions

Validating Credit Card Numbers

  • kcmutya
     + 1 comment
    import re

# Enter your code here. Read input from STDIN. Print output to STDOUT
test_cases = int(input())
for num in range(test_cases):
    case = input()
    valid_card_pattern = re.compile(r'^(?!.*(\d)(-*\1){3,})([4-6][0-9]{3}-?([0-9]{4}-?){3})$')
    if valid_card_pattern.match(case):
        print('Valid')
    else:
        print('Invalid')